Re: parport_pc disables parallel port on unload.

[Bill Unruh]

On Wed, 24 Sep 2008, Bodo Eggert wrote:

> Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote:
>
> > I have a parallel port module gps.c which I have written ( after the short
> > module described in Linux Device Drivers), whose purpose is to timestamp
> > the occurance of interrupts on the parallel port Ack line to as high a
> > temporal accuracy as possible.These are generated by the PPS line of a Gamin
> > 18LVC gps receiver. Since I want the highest accuracy possible I do not want
> > the latency of going through the stock drivers and waiting for a poll or
> > select to let me know an interrupt has occured.
>
> > So, could anyone point me to some relatively comprehensible documentation (
> > or "canned program") to show me how to switch the parallel port back on if
> > unloading parport_pc has switched it off.
>
> You can copy/paste the relevant parts from the parport_pc driver.

Of course, then, identifying the relevant parts becomes the problem, but
thank you.

>

--
William G. Unruh   |  Canadian Institute for|     Tel: +1(604)822-3273
Physics&Astronomy  |     Advanced Research  |     Fax: +1(604)822-5324
UBC, Vancouver,BC  |   Program in Cosmology |     unruh@xxxxxxxxxxxxxx
Canada V6T 1Z1     |      and Gravity       |  www.theory.physics.ubc.ca/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/